Subject: bug#23904: Btrfs clone support in copy operations

From: Dmitry Antipov <[email-masked]>
Date: Wed, 6 Jul 2016 05:45:18 +0300

On 07/06/2016 03:49 AM, Paul Eggert wrote:

> The attached proposed patch to Emacs master builds on a suggestion by Kieran Colford.

IMHO this should use FICLONERANGE in a loop where you can
handle errors and use process_pending_signals as usual.

Dmitry